DM3D/L Training course by Nick Lai

Agenda DM3D and DM3L No Power No Post How to debug Key signals

DM3D and DM3L The difference between DM3D and DM3L CPU Memory SIO DM3D is using Intel graphics (915GM North bridge, FSB 533MHz) DM3L is using Intel graphics (910GML North bridge, FSB 400MHz) CPU Banias 400 Dothan 533 Memory DM3D/L is DDRII which is not compatible with DDR. The socket key is different. SIO DM3D/L series are Mac III

DM3D and DM3L Video Cardbus LOM MDC Support Express card DM3D/L is Intel graphic Cardbus DM3D/L series are TI cardbus LOM DM3D/L series are PCI bus 10/100Base LAN MDC DM3 low cost MDC Support Express card

Block Diagram

Top

Bottom

I/O board

LED board

Touch pad board

No Power Short Open Debug skill (Use Power sequence) Capacitor cracking Metal garbage PCB Assembly issue Bad parts Burn parts Open Debug skill (Use Power sequence) Power switch (the current on power supply) +3VALW SUN_ON Flash and SIO interface. Thermal protector (U8) Power good (ICH_PWROK)

No Post Power level Thermal protector Power good (ICH_PWROK) Clock Use debug card POST LED LCD or CRT no display

How to debug Q&A

Key signals Review the schematics CPU NB VGA ICH6 SIO SMbus CPUPWRGD CPURST# ADS# CPU_VID0~5 Vref NB VGA LCD power or LCD signals Inverter ICH6 ICH_PWR PLTRST# PERST# SIO SUS_ON Most of GPIO SMbus Voltage level Review the schematics

Q&A